<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img src="../assets/images/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="quitOut">退出</el-button>
    </el-header>
    <el-container>
        <!-- 侧边栏区域 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFE"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activeIndex"
        >
        <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
              <!-- 一级菜单模板 -->
            <template slot="title">
              <i :class="iconObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
              @click="saveActiveIndex('/'+subItem.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
        <!-- 主体区域 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menuList: [],
      iconObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activeIndex: ''
    }
  },
  created() {
    this.getMenuList();
    this.activeIndex = window.sessionStorage.getItem('activeIndex');
  },
  methods: {
    /* 退出登录 */
    quitOut() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    /* 获得菜单栏信息 */
    async getMenuList() {
      let { data: res } = await this.$http.get('menus');
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
     // console.log(res);
    },
    /* 点击修改菜单栏得折叠状态 */
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    /* 保存当前高亮的index */
    saveActiveIndex(path) {
      window.sessionStorage.setItem('activeIndex', path);
      this.activeIndex = path;
    }
  },
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  padding-left: 0;
  padding-right: 0;
  display: flex;
  justify-content: space-between;
  color: #fff;
  font-size: 22px;

  div {
    display: flex;
    align-items: center;

    span {
      padding-left: 5px;
    }
  }
}
.el-aside {
  background-color: #333744;

  .el-menu {
    border-right: 0px;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4A5064;
  font-size: 12px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.3em;
  cursor: pointer;
}
</style>